<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <title></title>
</head>
<body>

<form action="add.do" method="post">
    <p>用户名:<input type="text" name="username" value="admin" readonly="readonly"/></p>
    <p>密码:<input type="password" name="password"/></p>
    <input type="radio" checked/>
    <input type="checkbox" checked/>
    <button type="button">登录</button>
</form>


<table border="1" cellspacing="0" width="200" height="200">
    <caption>学生信息表</caption>
    <thead></thead>
    <tbody></tbody>
    <tfoot></tfoot>
    <tr>
        <td>1-1</td>
        <td>1-2</td>
        <td>1-3</td>
        <td>1-4</td>
    </tr>
    <tr>
        <td rowspan="3">2-1</td>
        <td rowspan="2" colspan="2">2-2</td>
        <!--        <td rowspan="2">2-3</td>-->
        <td>2-4</td>
    </tr>
    <tr>
        <!--        <td>3-1</td>-->
        <!--        <td>3-2</td>-->
        <!--        <td>3-3</td>-->
        <td>3-4</td>
    </tr>
    <tr>
        <!--        <td>4-1</td>-->
        <td>4-2</td>
        <td>4-3</td>
        <td>4-4</td>
    </tr>
</table>


</body>
</html>
